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fatfs: enabled reading sector size and sectors count from boot sector in rawflash

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This commit is contained in:
Martin Gaňo
2022-09-28 12:58:48 +02:00
parent f33ac0a037
commit 41742c2369
5 changed files with 57 additions and 31 deletions
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71
components/fatfs/diskio/diskio_rawflash.c
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@@ -1,16 +1,8 @@
// Copyright 2015-2018 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/*
* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <string.h>
#include "diskio_impl.h"
@@ -22,11 +14,48 @@
static const char* TAG = "diskio_rawflash";
const esp_partition_t* ff_raw_handles[FF_VOLUMES];
static const esp_partition_t* s_ff_raw_handles[FF_VOLUMES];
// Determine the sector size and sector count by parsing the boot sector
static size_t s_sector_size[FF_VOLUMES];
static size_t s_sectors_count[FF_VOLUMES];
#define BPB_BytsPerSec 11
#define BPB_TotSec16 19
#define BPB_TotSec32 32
DSTATUS ff_raw_initialize (BYTE pdrv)
{
uint16_t sector_size_tmp;
uint16_t sectors_count_tmp_16;
uint32_t sectors_count_tmp_32;
const esp_partition_t* part = s_ff_raw_handles[pdrv];
assert(part);
esp_err_t err = esp_partition_read(part, BPB_BytsPerSec, &sector_size_tmp, sizeof(sector_size_tmp));
if (unlikely(err != ESP_OK)) {
ESP_LOGE(TAG, "esp_partition_read failed (0x%x)", err);
return RES_ERROR;
}
s_sector_size[pdrv] = sector_size_tmp;
err = esp_partition_read(part, BPB_TotSec16, &sectors_count_tmp_16, sizeof(sectors_count_tmp_16));
if (unlikely(err != ESP_OK)) {
ESP_LOGE(TAG, "esp_partition_read failed (0x%x)", err);
return RES_ERROR;
}
s_sectors_count[pdrv] = sectors_count_tmp_16;
// For FAT32, the number of sectors is stored in a different field
if (sectors_count_tmp_16 == 0){
err = esp_partition_read(part, BPB_TotSec32, &sectors_count_tmp_32, sizeof(sectors_count_tmp_32));
if (unlikely(err != ESP_OK)) {
ESP_LOGE(TAG, "esp_partition_read failed (0x%x)", err);
return RES_ERROR;
}
s_sectors_count[pdrv] = sectors_count_tmp_32;
}
return 0;
}
@@ -38,9 +67,9 @@ DSTATUS ff_raw_status (BYTE pdrv)
DRESULT ff_raw_read (BYTE pdrv, BYTE *buff, DWORD sector, UINT count)
{
ESP_LOGV(TAG, "ff_raw_read - pdrv=%i, sector=%i, count=%in", (unsigned int)pdrv, (unsigned int)sector, (unsigned int)count);
const esp_partition_t* part = ff_raw_handles[pdrv];
const esp_partition_t* part = s_ff_raw_handles[pdrv];
assert(part);
esp_err_t err = esp_partition_read(part, sector * SPI_FLASH_SEC_SIZE, buff, count * SPI_FLASH_SEC_SIZE);
esp_err_t err = esp_partition_read(part, sector * s_sector_size[pdrv], buff, count * s_sector_size[pdrv]);
if (unlikely(err != ESP_OK)) {
ESP_LOGE(TAG, "esp_partition_read failed (0x%x)", err);
return RES_ERROR;
@@ -56,17 +85,17 @@ DRESULT ff_raw_write (BYTE pdrv, const BYTE *buff, DWORD sector, UINT count)
DRESULT ff_raw_ioctl (BYTE pdrv, BYTE cmd, void *buff)
{
const esp_partition_t* part = ff_raw_handles[pdrv];
const esp_partition_t* part = s_ff_raw_handles[pdrv];
ESP_LOGV(TAG, "ff_raw_ioctl: cmd=%in", cmd);
assert(part);
switch (cmd) {
case CTRL_SYNC:
return RES_OK;
case GET_SECTOR_COUNT:
*((DWORD *) buff) = part->size / SPI_FLASH_SEC_SIZE;
*((DWORD *) buff) = s_sectors_count[pdrv];
return RES_OK;
case GET_SECTOR_SIZE:
*((WORD *) buff) = SPI_FLASH_SEC_SIZE;
*((WORD *) buff) = s_sector_size[pdrv];
return RES_OK;
case GET_BLOCK_SIZE:
return RES_ERROR;
@@ -88,7 +117,7 @@ esp_err_t ff_diskio_register_raw_partition(BYTE pdrv, const esp_partition_t* par
.ioctl = &ff_raw_ioctl
};
ff_diskio_register(pdrv, &raw_impl);
ff_raw_handles[pdrv] = part_handle;
s_ff_raw_handles[pdrv] = part_handle;
return ESP_OK;
}
@@ -97,7 +126,7 @@ esp_err_t ff_diskio_register_raw_partition(BYTE pdrv, const esp_partition_t* par
BYTE ff_diskio_get_pdrv_raw(const esp_partition_t* part_handle)
{
for (int i = 0; i < FF_VOLUMES; i++) {
if (part_handle == ff_raw_handles[i]) {
if (part_handle == s_ff_raw_handles[i]) {
return i;
}
}